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Probability
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OpenStudy (anonymous):
the total number of hours measured in units of 100 hours that a family runs a vaccum cleaner over a period of one year is a continuous random variable, x, that has probability density function: f(X) = x, 0≤ x ≤1 k-x, 1>x>2 0 elsewhere a. less than 120 hours b. between 50 and 100 hours
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